Adequacy (noun)

1. The quality of being suitable or sufficient for a specific purpose.
2. The quality of being enough or capable of meeting a requirement.
3. The quality of being equal to or meeting a standard.

Origin:

From latin adequatus, from adaequare ("to make equal"), from ad ("to") + aequare ("to make equal").

Examples:

1. The adequacy of the water supply was a major concern for the community.
2. The adequacy of the resources was determined before the project was started.
3. The adequacy of the insurance coverage was checked before the trip.
4. The adequacy of the education system was evaluated by the government.
5. The adequacy of the performance was satisfactory and met the expectations.